The first thing I would recommend is to roll back and half-fulfilled changes that were made with the System Restore utility. First save any open documents and close all programs then click Start (or tap the Windows key) and type s ·y ·s ·t ·e ·m r ·e ·s ·t ·o ·r ·e then choose System Restore from the Programs section of the list above. When System Restore starts, click Next and pick the most recent restore point that is prior to your attempt to create a clean boot environment. Follow the remainder of the steps in this article.
Restore system files and settings
After you've recovered your computer to its state prior to the attempt to establish a clean boot environment, begin with a malware scan using a free anti-malware scanning utility like MalwareBytes.
It come in standard offerings of free and pay-for versions. For stand-alone scans and malware removal (but not real-time scanning), the free version is usually more than sufficient.